puppeteer/website/versioned_docs/version-9.1.1/puppeteer.page.emulatemediafeatures.md

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Page](./puppeteer.page.md) &gt; [emulateMediaFeatures](./puppeteer.page.emulatemediafeatures.md)

## Page.emulateMediaFeatures() method

<b>Signature:</b>

```typescript
emulateMediaFeatures(features?: MediaFeature[]): Promise<void>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  features | [MediaFeature](./puppeteer.mediafeature.md)\[\] | <code>&lt;?Array&lt;Object&gt;&gt;</code> Given an array of media feature objects, emulates CSS media features on the page. Each media feature object must have the following properties: |

<b>Returns:</b>

Promise&lt;void&gt;

## Example


```js
await page.emulateMediaFeatures([
{ name: 'prefers-color-scheme', value: 'dark' },
]);
await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
// → true
await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
// → false

await page.emulateMediaFeatures([
{ name: 'prefers-reduced-motion', value: 'reduce' },
]);
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: reduce)').matches
);
// → true
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: no-preference)').matches
);
// → false

await page.emulateMediaFeatures([
{ name: 'prefers-color-scheme', value: 'dark' },
{ name: 'prefers-reduced-motion', value: 'reduce' },
]);
await page.evaluate(() => matchMedia('(prefers-color-scheme: dark)').matches);
// → true
await page.evaluate(() => matchMedia('(prefers-color-scheme: light)').matches);
// → false
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: reduce)').matches
);
// → true
await page.evaluate(
() => matchMedia('(prefers-reduced-motion: no-preference)').matches
);
// → false

await page.emulateMediaFeatures([{ name: 'color-gamut', value: 'p3' }]);
await page.evaluate(() => matchMedia('(color-gamut: srgb)').matches);
// → true
await page.evaluate(() => matchMedia('(color-gamut: p3)').matches);
// → true
await page.evaluate(() => matchMedia('(color-gamut: rec2020)').matches);
// → false

```